WorksheetsLONG QUIZ MC 1
Total questions: 25
Worksheet time: 8mins
One should not connect a number of electrical appliances to the same power socket because
This can damage the appliances due to overloading.
This can damage the electrical meter.
This can damage the domestic wiring due to overloading.
The appliance will not get full voltage.
Rays that pass through a lens very close to the principle axis are more sharply focused than those that are very far from the axis. This spherical aberration helps us understand which of the following phenomena?
It is easier to read in bright light than it is in dim light.
We become more far-sighted as we become older.
We become more near-sighted as we become older.
We can only see in black and white in dim light.
Which of the following describes an electron?
electrons are positively charged and are massive
mass of an electron is 1.67 x 10²⁴ grams
represents the atomic number
cathode rays are emitted when electricity is passed in an evacuated tube.
What part of Earth is thought to be composed of iron and nickel?
Asthenosphere
Hydrosphere
Lithosphere
Core
The standard temperature of a gas in 0°C and its standard pressure is _______________.
101.3 atm
1 atm
22.4 atm
273 atm
Which of the following is not a physical property of water?
freezing point at 0°C
boiling point at 100°C
Its density is at 4 degrees at 1 lb/cu.ft.
Its heat of fusion at 80 cal/g.
Which of the following statement is true?
none of the above
hydroxide is present in all acids
hydroxide is present in all bases
hydroxide is present in both
Which of the following is common bleaching agent?
Chlorine
Sodium Hydroxide
Sodium Chloride
Calcium Chloride
Who formulated the geocentric theory?
Copernicus
Galileo
Newton
Ptolemy
It is a special area of the atmosphere that protects the Earth from harmful ultraviolet rays emitted by the sun.
Thermosphere
Ionosphere
Ozone layer
Van Allen belts
The existence of extraterrestrial life may never be proven, but this idea will become more scientifically acceptable over time if ____________.
hypotheses are made related to the idea.
no one disputes this idea in a scientific forum.
alternative hypotheses are proposed and confirmed.
increasing scientific evidence supports the idea.
The gas used for artificial ripening of green fruit is:
Carbon dioxide
Acetylene
Ethylene
Ethane
Plants create their own food by absorbing and processing sunlight. The ability to produce one's own food source is a metabolic process known as..
Autotrophy
Heterotrophy
Ditrophy
Homotrophy
Which of the following statement is true of nuclear fission?
Lighter atoms can be combined to from heavier atoms.
The energy process is identical to that which occurs in the sun.
Atoms can gain or lose electrons without changing its charge.
The nucleus of the atoms can be broken or split to produce energy.
What is the main difference between prokaryotes and the eukaryotes?
The eukaryote is the only type of cell that is capable of photosynthesis.
The eukaryote has a nucleus but the prokaryote does not have.
The prokaryote has a nucleus but the eukaryote does not have.
The eukaryote is always larger than the prokaryote.
During summer, we feel comfortable under a fan because it:
Throws cool air on us.
Produces convection currents.
Produces air which takes heat away from us.
Set the air in motion, thereby increasing the evaporation of sweat.
Children born with a deficiency of thyroxin ________________ if deficiency is not checked.
become mentally retarded
have weak bones
lose their hair
grow too rapidly
Which of among the following are duplicated during the process of mitosis?
Chloroplast
Centromeres
Centrosomes
Chromosomes
The mass number of a nucleus is:
always more than the atomic weight.
the sum of the number of protons and neutrons present in the nucleus.
a fraction.
always less than its atomic number.
Alchemists in ancient Egypt tested gold for purity by remelting it and heating it. If the gold became whiter, it contained ___________.
silver
lead
tin
copper
Which of the following is not used in the manufacture of food by green plants?
sunlight
water and soil nutrients
oxygen
carbon dioxide
Radioactivity is a phenomenon of the spontaneous emission of:
Electrons (beta particles)
Protons (alpha particles)
Gamma rays (short wave electromagnetic waves)
All of these
Jojo wanted to find out if virgin coconut oil can be used as a preservative for peanuts. She placed 10 peanuts each in 2 glasses. In one glass, she added enough virgin coconut oil to cover the peanuts completely. She did not put any liquid on the other glass. She then kept the two glasses on a shelf and observed them for two weeks.
Which among the following is NOT a controlled variable in this experiment?
types of glass used
two weeks of observation period
number of peanuts
amount of virgin coconut oil
Chona actively participates in a task and also dutifully performs tasks assigned to her. What scientific attitude is displayed in this situation?
Unity
Camaraderie
Responsibility
Being a team player
It is the phenomenon in which energy is transferred through vibrations.
refraction
amplitude
waves
frequency
